Question

Three blocks of masses 4 kg, 2 kg and 1 kg are in contact on a smooth surface. If a pushing force of 14 N is applied on the heavier block, the contact force between the 1 kg and 2 kg blocks is
A) 2 N
B) 4 N
C) 6 N
D) 10 N

Answer 1

Answer:

correct answer is

D

10N

acc will be 2m/s^2

N= F - ma

=14-2×2

10

therefore contact force = 14-4=10N